One firm, WeCU (pronounced "We See You") 
Technologies, employs a combination of infra-red technology, remote sensors and imagers, and flashing of subliminal images, such as a photo of Osama bin Laden. Developers say the combination of these technologies can detect a person's reaction to certain stimuli by reading body temperature, heart rate and respiration, signals a terrorist unwittingly emits before he plans to commit an attack.
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could be "afterhours" plugs that are flashed subliminally Don...
heh heh... or a big ole skunk bud to see if there's a doobie hidden in your underwear...East End lu lol
you talk about a police state Salty... this is big brother scanning technology on multiple fronts and depths...times ten !
you have infa red ...facial recognition, profiling
you have back scatter for xray like
imagery now every where you go you will be scanned
for behavioral changes in response to certain stimuli....